22561181856 has 96 divisors (see below), whose sum is σ = 69266836800. Its totient is φ = 7124578560.

The previous prime is 22561181843. The next prime is 22561181893. The reversal of 22561181856 is 65818116522.

22561181856 is a `hidden beast` number, since 2 + 2 + 561 + 1 + 8 + 1 + 85 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670755 + ... + 703586.

It is an arithmetic number, because the mean of its divisors is an integer number (721529550).

Almost surely, 2^22561181856 is an apocalyptic number.

It is an amenable number.

22561181856 is an abundant number, since it is smaller than the sum of its proper divisors (46705654944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22561181856 is a wasteful number, since it uses less digits than its factorization.

22561181856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374379 (or 1374365 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The spelling of 22561181856 in words is "twenty-two billion, five hundred sixty-one million, one hundred eighty-one thousand, eight hundred fifty-six".